Easier Salvage
An easy way to salvage enemy mechs is to shoot off one of their legs. Have a group of mechs and concentrate your pulse lasers at one leg. This increase your chances for success.

Unlimited Salvage
There is a way to salvage the same mech again. Save your game immediately after you finish collecting your salvage. Then load the game. It will be back again for you to salvage. It works after any mission.

Video Select
Use explorer on your Mechwarrior 3 CD. Then open the folder named "video". Double click on any video you want.